【源码编辑】游戏内添加时间显示及在线时间

添加文件：
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WndWorld.cpp
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CString string;
 CTime time = CTime::GetCurrentTime();
 string = time.Format( "真实时间: %H:%M:%S" );
 p2DRender->TextOut( 5,  140 , string, D3DCOLOR_ARGB( 255, 0, 255, 255 ) );
 TCHAR str[64];
 _stprintf( str, "瑞嘉时间: %d:%d:%d",g_GameTimer.m_nHour,g_GameTimer.m_nMin,g_GameTimer.m_nSec);
 p2DRender->TextOut( 5,  155 , str, D3DCOLOR_ARGB( 255, 0, 255, 255 ) );
 TCHAR strtime[64];
 char* szT = new char[32];
 MakeShowTime((GetCurrentTime() - g_jointime) / 1000,szT);
 _stprintf(strtime,"在线时间:%s",szT);
 p2DRender->TextOut(5,170,strtime,0xff00ffff);

g_jointime - -这个是怎么定义的？？？添加进去 未定义